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Construction method of bottom-sealing-free prefabricated expanded bore pile
The construction method comprises the following steps that S1, equipment enters a site, and pile positions are marked according to construction requirements; s2, the bottom end of the prefabricated pipe pile is not sealed, after the prefabricated pipe pile is pressed downwards to a designed bearing stratum at the pile position, the topsoil in the hollow part of the prefabricated pipe pile is taken out, and the soil taking depth exceeds the bottom end of the prefabricated pipe pile; or penetrating a force transmission hammer into the hollow part of the prefabricated pipe pile, and pressing the force transmission hammer and the prefabricated pipe pile to the designed bearing stratum; s3, filling materials are put into the hollow part of the prefabricated pipe pile in batches, a force transmission hammer with the length larger than that of the prefabricated pipe pile extends into the hollow part of the prefabricated pipe pile, the force transmission hammer extrudes the filling materials in a downward pressing, spinning or hammering mode, and the filling materials form a compacted expanded head at the bottom of the prefabricated pipe pile; and S4, concrete is poured into the hollow part of the prefabricated pipe pile to form an inner pile. The bottom of the prefabricated pipe pile is not sealed, holes are not guided in advance, the pile descending efficiency can be improved, and the pile end bearing capacity can be ensured after soil is taken in the hollow part of the prefabricated pipe pile.
本申请涉及一种无封底预制扩底桩施工方法，其包括以下步骤：S1.设备进场，根据施工要求标记桩位；S2.预制管桩底端不封底，将预制管桩在桩位处下压至设计持力层后，将预制管桩中空部中的浮土取出，且取土进深超出预制管桩底端；或者，在预制管桩中空部穿入传力锤，并与预制管桩一同下压至设计持力层；S3.向预制管桩中空部中分批次投入填充料，在预制管桩中空部伸入长度大于预制管桩长度的传力锤，以下压、旋压或锤击方式使传力锤挤压填充料，并使填充料在预制管桩底部形成挤密的扩大头；S4.在预制管桩中空部中浇筑混凝土形成内桩。本申请的预制管桩不封底且不预先引孔，可以提高下桩效率，且在预制管桩中空部中取土后可确保桩端承载力。
Construction method of bottom-sealing-free prefabricated expanded bore pile
The construction method comprises the following steps that S1, equipment enters a site, and pile positions are marked according to construction requirements; s2, the bottom end of the prefabricated pipe pile is not sealed, after the prefabricated pipe pile is pressed downwards to a designed bearing stratum at the pile position, the topsoil in the hollow part of the prefabricated pipe pile is taken out, and the soil taking depth exceeds the bottom end of the prefabricated pipe pile; or penetrating a force transmission hammer into the hollow part of the prefabricated pipe pile, and pressing the force transmission hammer and the prefabricated pipe pile to the designed bearing stratum; s3, filling materials are put into the hollow part of the prefabricated pipe pile in batches, a force transmission hammer with the length larger than that of the prefabricated pipe pile extends into the hollow part of the prefabricated pipe pile, the force transmission hammer extrudes the filling materials in a downward pressing, spinning or hammering mode, and the filling materials form a compacted expanded head at the bottom of the prefabricated pipe pile; and S4, concrete is poured into the hollow part of the prefabricated pipe pile to form an inner pile. The bottom of the prefabricated pipe pile is not sealed, holes are not guided in advance, the pile descending efficiency can be improved, and the pile end bearing capacity can be ensured after soil is taken in the hollow part of the prefabricated pipe pile.
本申请涉及一种无封底预制扩底桩施工方法，其包括以下步骤：S1.设备进场，根据施工要求标记桩位；S2.预制管桩底端不封底，将预制管桩在桩位处下压至设计持力层后，将预制管桩中空部中的浮土取出，且取土进深超出预制管桩底端；或者，在预制管桩中空部穿入传力锤，并与预制管桩一同下压至设计持力层；S3.向预制管桩中空部中分批次投入填充料，在预制管桩中空部伸入长度大于预制管桩长度的传力锤，以下压、旋压或锤击方式使传力锤挤压填充料，并使填充料在预制管桩底部形成挤密的扩大头；S4.在预制管桩中空部中浇筑混凝土形成内桩。本申请的预制管桩不封底且不预先引孔，可以提高下桩效率，且在预制管桩中空部中取土后可确保桩端承载力。
Construction method of bottom-sealing-free prefabricated expanded bore pile
一种无封底预制扩底桩施工方法
SHAO LIANGRONG (author) / YANG QI (author) / WANG MING (author) / JIANG DA (author) / FENG QIN (author)
2025-01-03
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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